题目

阅读理解What if you could give your children everything they wantedwithout them having to take any effort at all to get it？Would they appreciate whatthey now have？Would they know how to even maintain thelifestyle or how to keep the business moving forward and not downward?There is some debate among parents of this new generationabout the question of whether our children have been given so much that theynow expect everything all at once. A case in point is a friend of mine who hasa son in his late twenties. It is not that he doesn't have a good paying joband a really nice house. Actual下列各组物质，前者属于混合物，后者属于化合物的是A. 生铁 不锈钢 B. 生理盐水 氯化钠C. 石灰石 澄清石灰水 D. 蒸馏水 矿泉水 B 【解析】A、生铁和不锈钢都是铁的合金，合金都是混合物，故选项错误；B、生理盐水属于混合物，氯化钠属于纯净物中的化合物；故选项正确；C、石灰石、澄清石灰水都是混合物，故选项错误；D、蒸馏水属于化合物，矿泉水都属于混合物，故选项错误。故选B。